If I remember correctly, the particles commands were a little buggy. You have to position the emissions location of the particles, not the actual particles position. (Don't have the compiler in front of me and haven't tried playing with particles again since 5.5)
Quote: "i have a particles effect in my 2d game .. and i got it working now."
I take it you resolved the other problem
Like I said before particles are 3d and sprites 2d. 2d and 3d use different coordinates (2d=screen coords) (3d=world coords). Converting between the two can be quite a hassle. Good luck!
gl and hf